Filter barrel or tank.



No. 653,63l. v Patented July I0, |900.

J. C. WALLACE.

FILTER BARREL 0R TANK.

(Application led Fab. 14, 1900.)

(No Model.)

m ll H W JAMES C. WALLACE, OF C 'PATENT FFICE.

OLORADO CITY, COLORADO.

FILTER BARREL OR TANK.

SPECIFICATION forming part 0f Letters :Patent No. 653,631', dated July10, 1900.

Application tiled February 14, 1900. Serial No. 5,231. (No model.)

T0 a/ZZ whom t may concern:

Be it known that I, JAMES C. WALLACE, a prospective citizen of theUnited States, (having taken out first papers,) residing at ColoradoCity, in the county of El Paso and State of Colorado, have inventedcertain new and useful Improvements in Filter Barrels or Tanks, setforth in the annexed specification.

My invention is designed with special reference to the chlorinationprocess of treating precious ores, and particularly applies to thatdevice known as a filtering-barrel. I claim nothing new in the use offilter-barrels for such purposes in the abstract, since such deviceshave been known and in use for some time; but my invention lies incertain improvements within said filter-barrel whereby it is renderedmore efficient and economical in its operation.

The general purpose of a filter-barrel is as follows: Referring toFigure 1, which is a vertical longitudinal section through one, thepulverized ore is charged into the barrel through the manhole r,together with water and certain chemicals, such as chlorid of lime andsulfuric acid, used in and for the process of extracting the preciousmetal from the ore. When properly charged, the manhole r is securelyclosed by the cap s, and the barrel is caused to slowly revolve on itstrunnions t by means of gearing u v. After suflicient treatment theliquor which has taken up the precious metal in solution is drawn off atcock or valve w and is further flushed through valve The ore is thenremoved through manhole r. Now in order that the liquor drawn 0E atvalve w may be free from partiv cles of pulverized ore it is necessaryto interpose a ltering medium within the barrel, leaving some space atthe bottom to collect the liquor.

My invention consists in the kind of device which I employ to effectthis purpose and which is placed near the bottom` of the barrel, thebottom of the barrel being here understood as that arc of thecylinder-wall directly opposite and under the manhole r.

The particulars of my device I will now describe, reference being madeto the several ligures of the drawings, in which- Fig. 1 represents alongitudinal vertical section through the barrel; Fig. 2, a verticaltransverse section through the lower arc of the same; Fig. 3, a planview, iiattened out, of the elements b i; and Fig. 4, an enlarged viewof a portion of Fig. 1.

To the inside cylindrical wall of the barrel a, in its lowest are, Iattach a continuous series of metal plates ZJ by means of bolts c, asshown in Figs. 1 and 2, the plates b, which are curved, being thus heldfirmly at both ends and suspended in such wise as to leave acrescent-shaped space e between the bottom of said barrel-wall and theconvex faces of the said plates extending the length of the barrel.These plates are perforated. with drain-holes f, their general shapewhen flattened out being shown in plan view in Fig. 3. The holes for thebolts c are shown at g. Upon the concave surface of these plates b Ispread a filtering-cloth 7i, completely covering over all thedrain-holes f and reaching as a practically-continuous sheet from end toend o f the barrel et. To keep this filtering-cloth h in close contactwith the whole concave surface of the plates b, I place a series of con;vexly-bent bars t, whose ends j are fork-shaped to receive the innershanks m of the bolts c, being clamped down by the inner nuts lo. Toinsure the upper edges of this filtering-cloth h being kept down tightupon the plates b, I run a filling-strip o the entire length, said stripbeing likewise clamped down by the necks j of the bars t'. In Fig. 1 thefilteringcloth h and filling-strip o are shown broken o for part oftheir length in order to better reveal the plates b, lying underneath.The bolts c are constructed with a solid head n about midway theirlength, dividing the bolt into twol parts-an outwardly projecting shankc and an inwardly-projecting shank ln-the purpose of which is to allowof .the plates b being permanently fastened between the head n and thenut p to the cylindrical shell a of the barrel, while the bars t',filling strip o, and filter-cloth h may be removed and replaced asfrequently as desired.

It will be understood that when this device is used. in a chlorinationprocess all metal parts within the barrel must be covered with a leadcoating, as is well known.

A special advantage in my design and ar rangement of parts is that itgives greater space for ore abovel the filter-cloth and for IOO liquorbelow than any device known to me nowr on the market, also a largeriltering area, also greater simplicity and durability.

What I claim as new and original, and desire to secure by LettersPatent, is-

l. In a filter barrel or tank aseries of curved metal plates,perforated, held to the inside Wall of said barrel by bolts through theopposite ends of said plates in suoli manner as to form a lunarspacebetween the under surface of said plates and the bottom of said barrel;substantially as shown.

2. In a filter barrel or tank,a iltering device consisting of a seriesof curved metal plates, perforated, fastened to the inside wall or Wallsof said barrel or tank: a filter-cloth upon the upper surface of saidplates, secured thereon by a series of imposed metal bars andfillingstrips secured in position by bolts or other fastening:r devicesto the Wall or walls of said barrel or tank.

JAMES o. WALLACE.

Witnesses:

CHAs. SPRAGUE, FRANCIS D. PAsToRIUs.

